She picked up the gongs for the Best TV Presenter and the Best TV Personality while the daytime show bagged an award for the Best Talk Show.
During Tuesday's programme, Susanna was quick to boast about her prizes as Piers, 54, jokingly mocked her.
Piers said: "I'm all about winning and I'm not going to be a hypocrite. Apparently we're the best talk show even though I do a talk show, which is not this show and didn't get nominated, but we'll move on."
Susanna cut in: "No, expect that the talk show you do - this show - won," to which Piers replied: "Yeah but this is not a talk show."
Susanna quipped: "Well you do a lot of talking!"
Moving on to Susanna's personal awards, Piers mocked: "This is what I like, Celebrity Personality of the Year, Susanna Reid... that well known personality.
"And the Best TV Presenter, obviously yeah. I'm very very happy for you, I really am."
Susanna won the Best Presenter and Best Celebrity Personality awards at the @RealityTVAwards last night - and Piers couldn’t be happier! @susannareid100 | @piersmorgan | @RichardAArnold | @CharlotteHawkns | #GMB pic.twitter.com/sIIHKXDZAzI don't know how I'd do it without you, I really don't, but well done.
— Good Morning Britain (@GMB) October 1, 2019
He continued: "I don't know how I'd do it without you, I really don't, but well done," before he went on to mock the design of the awards.
Susanna then said: "How come you're all about the winning but then we win and you have to knock it?"
Their co-star Charlotte Hawkins told Piers: "You're just jealous!"
The GMB crew were then seen cheering Susanna while wearing t-shirts with the presenter's face printed on it.
Piers continued: "I'm a team player as everyone knows so I'm really thrilled for the team and Susanna and I couldn't be happier that she won all these awards."
Susanna said: "We won the Best Talk Show, just enjoy it."
Picking up Susanna's award, Piers mocked: "Yeah. Best Personality of the Year... I'm just holding in it in the hope that one day I might win something."
Susanna quipped: "You're just jealous!"
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